Sweetwater Regional Park Weather Forecast

    • 68
    • 84

    Increasing Clouds

    • 66
    • 82

    Partly Sunny

    • 64
    • 80

    Partly Sunny

    • 63
    • 78

    Mostly Sunny

    • 63
    • 79

    Mostly Sunny

    • 65
    • 82

    Mostly Sunny

    • 67
    • 86

    Mostly Sunny

Today 12 Sep San Diego County Coastal Areas

Partly cloudy with patchy fog this morning. Becoming mostly sunny. Highs 78 to 83 near the coast to 84 to 88 inland. Areas of Winds south to 10 Mph.

Tonight 12 Sep San Diego County Coastal Areas

Partly cloudy this evening. Becoming mostly cloudy. Patchy fog overnight. Lows 64 to 68. Light Winds.

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Sweetwater Regional Park Temperature Statistics

September Temperature

San Diego, Brown Field Municipal Airport (6.8 miles)

  • Lowest 3 September, 2026

    56.6 °F

  • Average September

    78.4 °F

  • Highest 9 September, 2026

    99 °F

Climate (2021–2026)

San Diego, Brown Field Municipal Airport (6.8 miles)

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  • Average Low 2021–2026

    54.3 °F

  • Average 2021–2026

    64 °F

  • Average High 2021–2026

    74.3 °F
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